Northern Irish hopefuls Sycerika McMahon, Melanie Nocher and Bethany Carson missed out on qualification for the 200m freestyle semi-final at the European Championships on Friday.
McMahon was .08secs outside the top 16 as she clocked 2:02.17 to finish 18th.
Nocher, who like McMahon earned Olympic qualification earlier this week, clocked 2:03.21 to finish 21st.
Carson was 27th after clocking 2:03.68 while Nuala Murphy opted out to concentrate on the later 1500m heats.
The four swimmers helped Ireland take a battling sixth in the 4x200m freestyle relay final on Sunday.
The Irish quartet 8:13.30 to qualify seventh for the final and were over four seconds faster in the final.
Despite their heroics, it wasn't enough to qualify the quartet for the Olympics as they needed a top-four finish.